Ventilator



y 24, 1931 F. w. BUTT ET AL 1,860,135

' VENTILATQR Filed March 31, 1926 ""ZT f' J 4 gvwwcozs F'rez/er/a W Butt. Alexander M 60/14 g cbelr awn/W 4 W 4 fm Patented May 24, 1932 Y 'Uiur Eo srIATES- H PAT FnnnERIo WQZBUTTJOF BiiooKLYn, Ann nnnxaivnnnjivicennnor :nnw Yon Q v. 2.

-- vENmILAroR 7 pplication fiiea ivrareh f31, 192s. SeriaI No. 98,676.

I QF-F provided with aclosure device controlled by '10 the draft of airin amannerto efficiently maintain the desired ventilation. According to this invention a dependable and relatively" simple, inexpensive construction is provided for the-intended purposesi v i 15 and advantages" will morelclearly appear 1 from the detailed description given below taken with the accompanying drawings which form a part of-this specification; 1 20 this invention. 7 g a 1 Fig '2 is a plan view, partly in section of 25 the same device assho'wn in Fig. 1.

r Fig. 3 is a sectional view taken substantially along the line 3-3 of Fig. 1. -Fig. 4 is an enlarged view showing in detail a'form of rotatable closure member which 80 may form a part of the installation as'shown in Fig.1, and q r Fig. ,5 is a sectional view taken substantially along the line 55 of Fig. 4. c In F-'g.. 1 the shoulder-portion of the roof of a well known type of railway-passenger car is illustrated; This portion includes anouter vertical side wall portion 10 and an inner wall portiorr'll; In the con;

car equipped with'the ventilatorembodying first made throughjeach of these walls for ventilator openings. The inner wall 11 is" The position of this shutter when closedlis indicated by the dotted lines, a

The outer W ll-10 "may befo'rmed'iwith a 55. suitable iop'ening at, the, exterior of which a embodies means for creating Further and more specific; objects, features In the drawings, Fig. 1 illustrates in cross-" sectional elevation, a portion of a railway.

struction off-the cars the usualp rovision is stalled; fors 'example, -in' the construction shownthis device may comprise a sheet metal hood 16 having a downwardly and jtn -tward ly directed openingl'Z. The sheet-metal of suitable draft-v creating :device may-lbeini- 1 this hood is bentinwardly-and downwardly create an outward draft of air through the ventilator, responsive to movements .of the along the sides of the" opening 117' to provide flanges 18 which, "together" with thefothel' parts of the hood,are shaped in amannergto railwaycar in eitherdirection along the railroad track. This draft of air exhausting from the interior of the railway car will'be of a velocity substantially dependent upon the vehicle speedof travel, the draft tending to materially increase at-the higher speeds of travel, whereas when the vehicle is atr'est or substantially at'rest, relatively little draft is created throughthe ventilator;

9 At the'innerside of the opening through the Wall aplate member 19 may be secured a and is formed with a central aperturedportionsurrounded by a circular flange 20.

Within the flange 20 a number of openings may be provided throughthe plate 19. "In

the particular construction'shown,two .coinplenientary or concentric sector shaped openings 21 and 22 are formed; Plate 19,,eXcept,

for thesector openings 21 and 22, substantial- Y 'ly closes 'Ofi the ventilator openingthrough the wall :10;

, 7 At the apices of thecompl-elnentarysector shaped {openings a rotatable. closure member 23 may be-mounted upon a shaft 24;,1Wl1l0h 1.35.

shaft is preferably fixedto 'theplate 'l). The closure 'member maybe removably retained upon tlie'shaftQL- by asuitable cotter pin 25 for other desired means,and preferably may comprise a plurality of complementaryor Y concentric sector shaped plates integrally I which receives thegshaft wing in closed condition, theiplates 27am 28uare brought into, registration "with thero'penings formed-withvor'weldedsto a hub; portion'26 24. With the device asshown, the closure inember hasftwo portionsorlsectorphtes QZjand 28rcor- 1 i v responding respectively tofithe sector shapd' 1 openings 21-and 22. When theventiIa'tOr is,

fully opened condition, as shown in the drawings, the closure member 23 is turned to a position substantially 90 from its closed position,

In order to limit the rotational movement 'of the closure member,a suitable stop pin 29 may be mounted upon the plate member 27 for engagement with either of two stop pins 30 and 31. The stop pins 30 and 31 may be fixed upon thecircular flange and respectively serve to limit the closing and opening movements of the closure member. 7 7 r V The sector platemembers 27 and 28 may be of like construction, and; in theform shown,

they are provided with radially extending corrugations as at- 32, one sidewall of each corrugation bein preferably formed with a plurality of perforations as at 33, whereas the'opposite side walls of the corrugations are withoutperforations. The corrugations of; the sector plates serve'as'strengthening 7 means, and the perforationsfulfill a further purpose hereinafter described. Along one edge of each of the sector plate members a radially extending integral propeller blade is formed as shown at 34; At the edges of the-plate members the corrugations may ter- 7 minate in peripheral and'edge flanges or members at as 35"Wl11Cl1 serve to stiffen the plate members, preventing the passage of air .over th-e'peripheral edge of corrugated area and make possible a finished appearance.

. cordingly, when the railway car is at rest, the ventilator Wlll normally be maintalned 1n open condition, thus'provi'dx- The rotatable closuremember is preferably so balanced that it will normally be maintained by gravity in the open position. As-

or vehicle ing ample ventilation. When the vehicle assumes a substantial speed, then-the air exhausting hood 16 would normally tend to withdraw air from the vehicle, producing a a *lower pressure on the outside of the ventila- ,tor than on the inside thereof. 'Heretofore this-has resulted in excess ventilatlon at high speeds and a consequent waste of heated air, unless the ventilator is kept so nearly closed that insufficientventilation will be provided when the vehicle is at rest or traveling at a low speed, a

With the present invention," however, as the vehicle gains speed, the increasing-draft through the ventilatoropening or increasing difierencein pressureon opposite sides of the ventilator will act upon the propeller blades 3e and the perforated corrugated areas of the rotatable member and cause the same to turn toward its-closed position; Th-ea'ction of the draft of air upon the propeller blades will be sufficient .to initiate the closing movement, but under ordinary circumstances the propel lerrblades alone will'be ineffective to cause the rotatable member to completely close.

Therefore, in or-der to supplement the action of the propeller blade portions, the perforaby Letters Patent is l r tions 33 are provided. These perforations cause the force exerted against the two sides of each ofthe'corrugations 32 to be unbalanced and biased in a direction tending to move the rotatable member to closed position; Therefore, with the action of the propeller blade supplemented by the perfotherotatable member will substantially, parallel to the directions of travel of the car or vehicle but substantially perpendicular to the general-direction of movement of the air currents therethrough.

Accordingly; the rotatable member is restrained frommovement in response to rocking 7 or side to side motions of the vehicle. Therefore, transverse'movements of the ve jhicle willhave substantially no effect upon the operation of the ventilator. On the'other hand, any jarring movements"longitudinally of the vehicle will serve to assist thedraft of air in overcoming frictionalresistance in the device as it assumes itsproper-position' for the particular vehicle speed. Therefore, regardless of the nor-malvehicle. movements, the Ventilator will readily maintain the desired ventilation at various vehicle speeds.

Furthermore, the desired uniform "ventilationmay thus be maintained in a railway car whether the car moves forward orba'clzwardr The ventilator tends to maintain anapproximately constant'volume of air discharge at i the various vehlcle speeds, and since. the ventilator shutter -memberhas at least some" inertia and extends in a direction generally perpendicular to the direction ofmovement of the main air current through the 'ventilater, the shutter member'is not easily forced out of proper position by suddenpuifsiof air as of course occur adjacent railroad cars, par- I' abutments, etc. 4

ticularly when passing other trains-or bridge W hile we have described our improvements in greatdetail and with re'spectto a preferred form thereof, we donot desire tobe limited to such form or 'detailssince many changes and modifications-may be 'made and the'im- 'provel'nents embodied :in widely different forms, without departing'from the spirit and scope of r r or more-ofY-the ppended claims. i 7

and scope of'the invention in its'broader aspects; hence, we ,des1re toqc'over all modifications and forms coming within'the language or J Whatwe clai-ma's newand desire to secure- 1. A ventilator'comprising concentricsector shaped openings through :thewallof the enclosure to be 'ventilated,'.; and a closure therefor comprising concentric sector plates rotatably mounted at the apicesof said openings, said plates being formed with radial strengthening corrugations, terminating in; a peripheral flange. V

2. A ventilator comprising concentric sector shaped openings through the wall of the enclosure to be ventilated, and a "closure therefor comprising concentric sector plates rotatably mounted at the apices ofsaid openings, said plates being formed with radial corrugations, the side walls of certain corru gations being perforated whereby air drafts against the plates produce a turning movement for bringing the plates into full tration with the openings.

3.'A draft controlled ventilator closure comprising rotatably mounted concentric sector plates, one edge of each plate being integrally formed with a radially extending propeller blade, said plates also being formed with radial corrugations, each corrugation 7 having one side wall perforated for unbalancing the force of air currents against the two opposite wall areas of the corrugation whereby strong air drafts against the plates produce a turning movement for bringing the closure into full registration with an opening of corresponding shape. a

4. A draft controlled ventilator closure comprising rotatably mounted concentric sector plates radially corrugated' the corrugations being formed with means producing a turning movement responsive to strong air drafts against the same. 7

5. In combination with an enclosed 'vehicle having a ventilator opening, means for creating through said opening a draftof air of a velocity substantially dependent upon the vehicle speed of travel, and a closure device at said opening controlled by said draft of air, said closure *device having propeller means for initiating its closing action,

and additional means cooperating with the V 7 draft of air to move the device to its fully l closed position in response drafts through the opening; I

6. A draft controlled ventilator closure to strong air comprising a rotatably mounted plate formed V with depresslons in its surface, perforations of the wall and on an axis adjacent said openregisthewall and on an axis adjacent said openradial direction and terminating at their outer edges in flanges extending transversely of said corrugations and in a generally peripheral direction. 7 7

8. A ventilator construction in which an opening is provided through the wall of the enclosure to be ventilated, and a closure for said opening comprising a plate member roe tatably mounted in a plane parallel to that ing, said axis being perpendicular to thewall, said plate being formed with strengthening "corrugations extending ina generally radial direction, terminating in a peripheral flange. 9. A ventilator construction in which anopening is provided through the wall of the enclosure to be ventilated, and a closure for said opening comprisinga platev member r0- tatably mounted in a plane parallelto that of ing, said axis being perpendicular to the wall, said plate being formed with strengthening corrugations extendingin a generally radial direction, terminating ina peripheral flange, the side walls of, one or more of said corrugae tions being perforated whereby air drafts T against thesame produce a turning movement for bringing the closure into registration withthe op'eni g. i v In testimony whereof we have signed our names tothis specification. H

FREDERIC BUTT. ALEXANDER" .McGARY.

being formed through the plate at said de'- pressions whereby air drafts against the plate produce a turning moment of force tending to rotate the closure toward its closed position. 7 v i 7. Aventilator construction comprising a plurality of openings through the wall of the enclosure to be ventilated, and a closure memher therefor comprising a rotatably mounted plate member having portions for covering each of said openings, said plate member being rotatable on an axis perpendicular to the wall adjacent said openings, each of said plate portions being formed with strengthening corrugations extending in a generally 

